US20020057078A1 - Protective circuit for an electronic device - Google Patents
Protective circuit for an electronic device Download PDFInfo
- Publication number
- US20020057078A1 US20020057078A1 US09/977,617 US97761701A US2002057078A1 US 20020057078 A1 US20020057078 A1 US 20020057078A1 US 97761701 A US97761701 A US 97761701A US 2002057078 A1 US2002057078 A1 US 2002057078A1
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- US
- United States
- Prior art keywords
- voltage
- protective circuit
- relay
- switch
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/247—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage having timing means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S323/00—Electricity: power supply or regulation systems
- Y10S323/908—Inrush current limiters
Definitions
- the invention relates to a protective circuit for an electronic device that is located between a constant voltage source and the operating voltage input of the device and consists of a diode and a limiting resistor that are connected in series.
- a plurality of electronic devices are fed from a constant voltage source, a battery for example, or from a local constant voltage network.
- a constant voltage source a battery for example
- expensive component parts of the device may be destroyed as a result thereof so that a reverse battery protection is provided for in the form of a diode or a diode bridge for example.
- Due to inductive and/or capacitive component parts the connection of the device to the constant voltage source may furthermore lead to very high transient current pulses, which also may cause the destruction of component parts. Although this may be prevented in many cases by fast blow fuses, e.g., safety fuses, it requires lots of work to replace the fuses; therefore, a limiting resistor, more specifically a thermistor, is used to limit inrush current.
- such type protective circuits consisting for example of a diode and a thermistor, produce permanent losses which reduce the overall efficiency of the device.
- the additional permanent loss amounts to approximately 5 Watt.
- the solution to this object is a protective circuit of the type mentioned herein above in which the diode and the limiting resistor are bridged by a controlled switch and a voltage monitor is connected to an operating voltage of the device, said voltage monitor being devised to deliver a switch signal that closes the switch as soon as a predeterminable minimum value of the operating voltage has been reached.
- the protective circuit is only in operation when it is actually needed, that is to say during transient.
- the permanent losses of the protective circuit are now only determined by the resistance of the closed switch and are up to two orders of magnitude below that of the protective circuits of the art.
- the monitored operating voltage is the power supply voltage of the device.
- the device is a power supply unit, it may be practical that the monitored voltage be its output voltage.
- a variant with very little permanent loss is characterized in that the controlled switch is constituted by a relay with a normally open contact. It may be advisable to connect a field winding of the relay in series with the collector-emitter-path of a gating transistor and to have said transistor gated by a voltage comparator of the voltage monitor.
- the device is a power supply unit, it is advisable to connect a field winding of the relay to the output voltage, the very relay including the voltage monitor.
- the controlled switch is formed by a switching transistor. This permits to better control the switching operation.
- the switching transistor may for example be gated by a voltage comparator of the voltage monitor.
- the switching transistor may be gated by a voltage comparator of the voltage monitor.
- FIG. 1 is a basic illustration of a protective circuit in accordance with the invention
- FIG. 2 is a view of a protective circuit in accordance with the invention, utilizing a relay
- FIG. 3 is a view of a protective circuit in accordance with the invention, utilizing a switching transistor
- FIG. 4 is a view of a protective circuit in accordance with the invention for a power supply unit utilizing a relay
- FIG. 5 is a view of a protective circuit in accordance with the invention for a power supply unit utilizing an optocoupler and a switching transistor.
- an electronic device G is intended to be fed from a constant voltage source U v .
- a protective diode D v is located in series with a current limiting resistor R between the device G and the constant voltage source U v .
- This series connection D v /R is bridged by the normally open contact of a controlled switch S, a voltage monitor W being provided for gating the switch.
- This voltage monitor W monitors an operating voltage U B of the device, its input voltage for example, and is devised to supply a switch signal s to the controlled switch S as soon as an adjustable minimum value U M of this operating voltage U B has been reached.
- the monitored operating voltage U B will increase as well and—as soon as it has reached its predetermined value U M —the monitor W will deliver a switch signal s to the switch S which closes as a result thereof so that the voltage drops heretofore occurring at the diode D V or at the limiting resistor R v disappear and the corresponding power loss is no longer of any significance.
- the limiting resistor R v may be dispensed with when the forward resistance of diode D V has a value that is high enough for the respective one of the current limitation wanted.
- the monitoring circuit W is connected between a constant voltage U v and the input operating voltage U B of a device G.
- a diode D V and a limiting resistor R v are again located in series, this series connection being bridged by a normally open contact a of a relay A and a buffer resistor R v being, in this exemplary embodiment, located in series with the normally open contact a.
- a comparator K is provided for monitoring the voltage.
- the positive input of this comparator K is supplied with the voltage, which is proportional to the operating voltage U B of the device G, said voltage having been gathered from a voltage distributor R 1 /R 2 and passed through a resistor R e whereas the voltage at the negative input of the comparator K is the voltage of a Zener diode D Z in the form of a reference voltage.
- the current passing through the Zener diode D Z is produced by means of a resistor R Z .
- the output of the comparator K which is here provided with a resistor R r , is supplied to the base of a transistor T a via a limiting resistor R a in the collector circuit of which there is located the field winding A of relay A, a, whereas the emitter of transistor T a is located at the negative line.
- the permanent power loss is of 40 m W. If, at the same current of 2A, the loss at the diode D v is 0.7 ⁇ 2A, i.e., 1.4 W, and if a limiting resistor such as a thermistor with an operational resistance of 1 ohm is being used, the ohmic loss is of 4 W and the overall permanent power loss of 5.4 W. This power loss is two orders of magnitude higher than with the protective circuit according to the invention.
- FIG. 3 A variant of the invention utilizing a switching transistor T a is shown in FIG. 3.
- this circuit resembles the one of FIG. 2 but for the relay contact that is replaced by the emitter-collector-path of the switching transistor T a , said switching transistor being supplied from the output of comparator K to the base of the switching transistor T a via a resistor R t and a dropping resistor R b , a resistor R c being located in the collector of said transistor.
- FIG. 3 also shows how for example a “slow” connection of the transistor may be achieved in order to additionally limit the maximum input current.
- the illustrated resistor R c together with a capacitor C r5 serves this purpose, the switching delay and the rise of the current through transistor T s respectively being determined by the time constant of the RC element R t /C t .
- this RC element may also be dispensed with, the capacitor C t being omitted and the resistor R t being replaced by a short circuit in this case.
- FIG. 4 illustrates an exemplary embodiment in which the device is a power supply unit, e.g. a switching power supply unit, that is fed from a constant voltage source U v , an intermediate circuit voltage for example, and has an output constant voltage U A .
- the diode D v and the protective resistor R v are connected in series in a manner well known in the art, this series connection being bridged by a normally open contact a of a relay A, a.
- the field winding A of the relay has, at the constant voltage output of the power supply unit G, a nominal output voltage U A .
- the relay or the relay winding respectively, is dimensioned in such a manner that, when the output voltage U A reaches a determined value, the relay responds, the contact a closes and the series connection R v /D v bridges.
- a relay A In addition to the low contact resistance of the normally open contact a, the use of a relay A, a also has the advantage of indirect coupling that may be necessary with a power supply unit for example.
- FIG. 5 Another variant of the invention according to FIG. 5 also illustrates an indirect coupling, although here, in a way similar to that shown in FIG. 3, a switching transistor T s is being used.
- the output voltage of a power supply unit G is monitored and is supplied to the positive input of a comparator K via a voltage distributor R 1 /R 2 .
- the Zener voltage of a diode D Z with a dropping resistor R Z and the comparator K which has a feedback resistor R r , gates the diode of an optocoupler O via a resistor R o .
- Collector C and emitter E of the transistor pertaining to the optocoupler are connected to the input side of the power supply unit G at the points labeled with the respective letters C and E and, when the optocoupler switches through, a base current flows through a resistor R b , the transistor of the optocoupler and into the base of the switching transistor T s that now switches through.
Abstract
Description
- The invention relates to a protective circuit for an electronic device that is located between a constant voltage source and the operating voltage input of the device and consists of a diode and a limiting resistor that are connected in series.
- A plurality of electronic devices, such as switching power supply units for example, are fed from a constant voltage source, a battery for example, or from a local constant voltage network. When the device is connected to the constant voltage source with the wrong polarity, expensive component parts of the device may be destroyed as a result thereof so that a reverse battery protection is provided for in the form of a diode or a diode bridge for example. Due to inductive and/or capacitive component parts, the connection of the device to the constant voltage source may furthermore lead to very high transient current pulses, which also may cause the destruction of component parts. Although this may be prevented in many cases by fast blow fuses, e.g., safety fuses, it requires lots of work to replace the fuses; therefore, a limiting resistor, more specifically a thermistor, is used to limit inrush current.
- In operation, such type protective circuits, consisting for example of a diode and a thermistor, produce permanent losses which reduce the overall efficiency of the device. When the device has an input current of 2A and when a diode and a 1 ohm limiting resistor are being used, the additional permanent loss amounts to approximately 5 Watt.
- It is an object of the present invention to provide a protective circuit that will cause considerably less permanent losses.
- The solution to this object is a protective circuit of the type mentioned herein above in which the diode and the limiting resistor are bridged by a controlled switch and a voltage monitor is connected to an operating voltage of the device, said voltage monitor being devised to deliver a switch signal that closes the switch as soon as a predeterminable minimum value of the operating voltage has been reached.
- Thanks to the invention, the protective circuit is only in operation when it is actually needed, that is to say during transient. The permanent losses of the protective circuit are now only determined by the resistance of the closed switch and are up to two orders of magnitude below that of the protective circuits of the art.
- Advantageously, the monitored operating voltage is the power supply voltage of the device.
- If the device is a power supply unit, it may be practical that the monitored voltage be its output voltage.
- A variant with very little permanent loss is characterized in that the controlled switch is constituted by a relay with a normally open contact. It may be advisable to connect a field winding of the relay in series with the collector-emitter-path of a gating transistor and to have said transistor gated by a voltage comparator of the voltage monitor.
- If the device is a power supply unit, it is advisable to connect a field winding of the relay to the output voltage, the very relay including the voltage monitor.
- In another variant the controlled switch is formed by a switching transistor. This permits to better control the switching operation. The switching transistor may for example be gated by a voltage comparator of the voltage monitor.
- To limit the maximum input current, the switching transistor may be gated by a voltage comparator of the voltage monitor.
- If a buffer resistor of low impedance is located in series with the controlled switch, disturbances in switching are kept particularly low although slightly higher losses have to be accepted.
- With power supply units in particular, indirect coupling is advisable and may be achieved by connecting an optocoupler between voltage monitor and controlled switch.
- The invention and all of its advantages will be apparent from the following more particular description of exemplary embodiments as illustrated in the drawing in which
- FIG. 1 is a basic illustration of a protective circuit in accordance with the invention,
- FIG. 2 is a view of a protective circuit in accordance with the invention, utilizing a relay
- FIG. 3 is a view of a protective circuit in accordance with the invention, utilizing a switching transistor,
- FIG. 4 is a view of a protective circuit in accordance with the invention for a power supply unit utilizing a relay, and
- FIG. 5 is a view of a protective circuit in accordance with the invention for a power supply unit utilizing an optocoupler and a switching transistor.
- As shown in FIG. 1, an electronic device G is intended to be fed from a constant voltage source Uv. In the positive line, a protective diode Dv is located in series with a current limiting resistor R between the device G and the constant voltage source Uv. This series connection Dv/R is bridged by the normally open contact of a controlled switch S, a voltage monitor W being provided for gating the switch. This voltage monitor W monitors an operating voltage UB of the device, its input voltage for example, and is devised to supply a switch signal s to the controlled switch S as soon as an adjustable minimum value UM of this operating voltage UB has been reached.
- In case the device G is connected to the constant voltage source Uv with a wrong polarity, no current can pass through the diode Dv so that the operating voltage will remain at zero or will never reach its predetermined minimum value, the switch S remaining open. If the device G is connected with proper polarity, a current flows through diode Dv, said current being limited by limiting resistor Rv to such a value that the current surge that occurs is not inadmissibly high for neither the device G nor the constant voltage source Uv. Such current surges are to be expected in particular when operating voltages are filtered by capacitors of high capacitance. Since sufficient current now passes into the electronic device G through limiting resistor Rv, the monitored operating voltage UB will increase as well and—as soon as it has reached its predetermined value UM—the monitor W will deliver a switch signal s to the switch S which closes as a result thereof so that the voltage drops heretofore occurring at the diode DV or at the limiting resistor Rv disappear and the corresponding power loss is no longer of any significance.
- It should be noted at this point that the limiting resistor Rv may be dispensed with when the forward resistance of diode DV has a value that is high enough for the respective one of the current limitation wanted.
- In a practical realization according to FIG. 2, the monitoring circuit W is connected between a constant voltage Uv and the input operating voltage UB of a device G. In the positive line, a diode DV and a limiting resistor Rv are again located in series, this series connection being bridged by a normally open contact a of a relay A and a buffer resistor Rv being, in this exemplary embodiment, located in series with the normally open contact a. A comparator K is provided for monitoring the voltage. The positive input of this comparator K is supplied with the voltage, which is proportional to the operating voltage UB of the device G, said voltage having been gathered from a voltage distributor R1/R2 and passed through a resistor Re whereas the voltage at the negative input of the comparator K is the voltage of a Zener diode DZ in the form of a reference voltage. The current passing through the Zener diode DZ is produced by means of a resistor RZ. The output of the comparator K which is here provided with a resistor Rr, is supplied to the base of a transistor Ta via a limiting resistor Ra in the collector circuit of which there is located the field winding A of relay A, a, whereas the emitter of transistor Ta is located at the negative line.
- When switching the device G to the power supply voltage with the proper polarity, a current that is limited by the resistor Rv will flow into the device G, the operating voltage UB of which will increase to the same extent as the voltage at the positive input of comparator K, and, as soon as a value is reached that exceeds the voltage of the Zener diode DZ, the comparator K will switch through, gate the transistor Ta and energize the coil of relay A, a. The normally open contact a closes and the operating voltage for the device G now passes through the buffer resistor Rd. This buffer resistor is intended to prevent extreme voltage peaks and, as a result thereof, high-frequency disturbances, but in many cases it may be dispensed with.
- If the constant current for the device G is assumed to be 2A and the contact resistance of the relay to be 10 m ohm the permanent power loss is of 40 m W. If, at the same current of 2A, the loss at the diode Dv is 0.7×2A, i.e., 1.4 W, and if a limiting resistor such as a thermistor with an operational resistance of 1 ohm is being used, the ohmic loss is of 4 W and the overall permanent power loss of 5.4 W. This power loss is two orders of magnitude higher than with the protective circuit according to the invention.
- A variant of the invention utilizing a switching transistor Ta is shown in FIG. 3. In principle, this circuit resembles the one of FIG. 2 but for the relay contact that is replaced by the emitter-collector-path of the switching transistor Ta, said switching transistor being supplied from the output of comparator K to the base of the switching transistor Ta via a resistor Rt and a dropping resistor Rb, a resistor Rc being located in the collector of said transistor. As soon as, after connecting the device, the operating voltage UB has reached a determined value that can be determined by the Zener diode DZ or by the voltage distributor R1/R2 respectively, the switching transistor Ta is switched through and bridges the diode Dv and the dropping resistor Rv. The resistor Rc again serves to prevent extreme current peaks. FIG. 3 also shows how for example a “slow” connection of the transistor may be achieved in order to additionally limit the maximum input current. The illustrated resistor Rc together with a capacitor Cr5 serves this purpose, the switching delay and the rise of the current through transistor Ts respectively being determined by the time constant of the RC element Rt/Ct. Of course, this RC element may also be dispensed with, the capacitor Ct being omitted and the resistor Rt being replaced by a short circuit in this case.
- The embodiment according to FIG. 4 illustrates an exemplary embodiment in which the device is a power supply unit, e.g. a switching power supply unit, that is fed from a constant voltage source Uv, an intermediate circuit voltage for example, and has an output constant voltage UA. In the positive input line of the device G, the diode Dv and the protective resistor Rv are connected in series in a manner well known in the art, this series connection being bridged by a normally open contact a of a relay A, a. The field winding A of the relay has, at the constant voltage output of the power supply unit G, a nominal output voltage UA. The relay, or the relay winding respectively, is dimensioned in such a manner that, when the output voltage UA reaches a determined value, the relay responds, the contact a closes and the series connection Rv/Dv bridges. In addition to the low contact resistance of the normally open contact a, the use of a relay A, a also has the advantage of indirect coupling that may be necessary with a power supply unit for example.
- Another variant of the invention according to FIG. 5 also illustrates an indirect coupling, although here, in a way similar to that shown in FIG. 3, a switching transistor Ts is being used. In the protective circuit according to FIG. 5, the output voltage of a power supply unit G is monitored and is supplied to the positive input of a comparator K via a voltage distributor R1/R2. At the negative input of comparator K there is the Zener voltage of a diode DZ with a dropping resistor RZ and the comparator K, which has a feedback resistor Rr, gates the diode of an optocoupler O via a resistor Ro. Collector C and emitter E of the transistor pertaining to the optocoupler are connected to the input side of the power supply unit G at the points labeled with the respective letters C and E and, when the optocoupler switches through, a base current flows through a resistor Rb, the transistor of the optocoupler and into the base of the switching transistor Ts that now switches through.
Claims (11)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0066699A AT408494B (en) | 1999-04-14 | 1999-04-14 | PROTECTIVE CIRCUIT FOR AN ELECTRONIC DEVICE |
AT666/999 | 1999-04-14 | ||
ATA666/999 | 1999-04-14 | ||
PCT/AT2000/000046 WO2000062393A1 (en) | 1999-04-14 | 2000-02-22 | Protective circuit for an electronic device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2000/000046 Continuation WO2000062393A1 (en) | 1999-04-14 | 2000-02-22 | Protective circuit for an electronic device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020057078A1 true US20020057078A1 (en) | 2002-05-16 |
US6538864B2 US6538864B2 (en) | 2003-03-25 |
Family
ID=3496620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/977,617 Expired - Fee Related US6538864B2 (en) | 1999-04-14 | 2001-10-15 | Protective circuit for an electronic device |
Country Status (8)
Country | Link |
---|---|
US (1) | US6538864B2 (en) |
EP (1) | EP1169763B1 (en) |
AT (2) | AT408494B (en) |
DE (1) | DE50000343D1 (en) |
DK (1) | DK1169763T3 (en) |
ES (1) | ES2182787T3 (en) |
PT (1) | PT1169763E (en) |
WO (1) | WO2000062393A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015100250A (en) * | 2013-11-20 | 2015-05-28 | 三菱電機株式会社 | Power Conditioner |
US20160252594A1 (en) * | 2011-06-17 | 2016-09-01 | Stephan Biber | Local shim coil within a local coil for local b0 homogenization in an mrt examination |
JP2016181461A (en) * | 2015-03-25 | 2016-10-13 | 三浦工業株式会社 | Fuel cell system |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040169981A1 (en) * | 2002-09-19 | 2004-09-02 | Andy Werback | Current limiting circuit |
US20050157479A1 (en) * | 2004-01-16 | 2005-07-21 | Hayden Douglas T. | Bus device insertion and removal system |
US20060145673A1 (en) * | 2005-01-03 | 2006-07-06 | Fogg John K | Method and apparatus for reducing inrush current to a voltage regulating circuit |
JP4847970B2 (en) | 2005-01-31 | 2011-12-28 | ジョージア テック リサーチ コーポレイション | Active surge current limiter |
DE102005040798A1 (en) * | 2005-08-29 | 2007-04-05 | Hanning Elektro-Werke Gmbh & Co. Kg | Control device for a supplied from a power source electric device with electronically controlled motor and method thereto |
ES2526917T3 (en) | 2005-10-24 | 2015-01-16 | Georgia Tech Research Corporation | Reduction of connection current due to voltage dips |
US7466573B2 (en) * | 2006-05-16 | 2008-12-16 | Honeywell International, Inc. | Method and apparatus for integrated active-diode-ORing and soft power switching |
EP2132850A4 (en) | 2007-04-05 | 2012-04-11 | Georgia Tech Res Inst | Voltage surge and overvoltage protection |
US8027142B2 (en) * | 2007-10-25 | 2011-09-27 | Honeywell International Inc. | Current-protected driver circuit for ignition exciter unit |
US8305783B2 (en) * | 2009-09-10 | 2012-11-06 | B/E Aerospace, Inc. | Systems and methods for polyphase alternating current transformer inrush current limiting |
US9299524B2 (en) | 2010-12-30 | 2016-03-29 | Innovolt, Inc. | Line cord with a ride-through functionality for momentary disturbances |
WO2012145383A2 (en) | 2011-04-18 | 2012-10-26 | Innovolt, Inc. | Voltage sag corrector using a variable duty cycle boost converter |
US8941264B2 (en) * | 2011-06-20 | 2015-01-27 | Bae Systems Information And Electronic Systems Integration Inc. | Apparatus for bi-directional power switching in low voltage vehicle power distribution systems |
CN103683888B (en) * | 2012-09-20 | 2017-03-29 | 施耐德东芝换流器欧洲公司 | The method of controlling security of the system with pre-charge circuit, equipment and its system |
DE102015217234A1 (en) * | 2015-09-09 | 2017-03-09 | Robert Bosch Gmbh | Circuit arrangement for supplying an electrical component |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US3529210A (en) * | 1967-02-28 | 1970-09-15 | Mitsubishi Electric Corp | Current limiting circuit |
DE3308320A1 (en) * | 1983-03-09 | 1984-09-13 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | CIRCUIT ARRANGEMENT TO LIMIT THE INLET CURRENT |
JPS59230298A (en) * | 1983-06-14 | 1984-12-24 | 林原 健 | Rush current excluding device |
DE4309974A1 (en) * | 1993-03-26 | 1994-09-29 | Bosch Gmbh Robert | Power supply circuit |
AU3965495A (en) * | 1994-10-11 | 1996-05-02 | Novitas, Incorporated | Line powered dc power supply |
-
1999
- 1999-04-14 AT AT0066699A patent/AT408494B/en not_active IP Right Cessation
-
2000
- 2000-02-22 DK DK00907333T patent/DK1169763T3/en active
- 2000-02-22 WO PCT/AT2000/000046 patent/WO2000062393A1/en active IP Right Grant
- 2000-02-22 EP EP00907333A patent/EP1169763B1/en not_active Expired - Lifetime
- 2000-02-22 PT PT00907333T patent/PT1169763E/en unknown
- 2000-02-22 DE DE50000343T patent/DE50000343D1/en not_active Expired - Lifetime
- 2000-02-22 ES ES00907333T patent/ES2182787T3/en not_active Expired - Lifetime
- 2000-02-22 AT AT00907333T patent/ATE221706T1/en active
-
2001
- 2001-10-15 US US09/977,617 patent/US6538864B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160252594A1 (en) * | 2011-06-17 | 2016-09-01 | Stephan Biber | Local shim coil within a local coil for local b0 homogenization in an mrt examination |
JP2015100250A (en) * | 2013-11-20 | 2015-05-28 | 三菱電機株式会社 | Power Conditioner |
JP2016181461A (en) * | 2015-03-25 | 2016-10-13 | 三浦工業株式会社 | Fuel cell system |
Also Published As
Publication number | Publication date |
---|---|
DK1169763T3 (en) | 2002-10-14 |
US6538864B2 (en) | 2003-03-25 |
ATE221706T1 (en) | 2002-08-15 |
AT408494B (en) | 2001-12-27 |
DE50000343D1 (en) | 2002-09-05 |
PT1169763E (en) | 2002-12-31 |
WO2000062393A1 (en) | 2000-10-19 |
ATA66699A (en) | 2001-04-15 |
ES2182787T3 (en) | 2003-03-16 |
EP1169763A1 (en) | 2002-01-09 |
EP1169763B1 (en) | 2002-07-31 |
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